He had been left out of the company's plans before.
NCT DREAM is promoting their song "Candy" right now, so they worked with Instagram to make special filters.
Fans were sad to find out that SM Entertainment had once again left out a certain member.
Fans who browsed through to make sure all 7 members were represented were disappointed to find that Jaemin's filter had been removed.
Fans took to Twitter right away to say how angry they were with SM Entertainment for making the mistake.
It hurt fans even more because it wasn't the first time the company had done something wrong.
SM Entertainment forgot to put Jaemin's name in the credits for NCT U's "Universe (Let's Play Ball)" unit, and they also left him off the group's "Love Again" poster.
SM Entertainment has not yet fixed Jaemin's missing "Candy" filter or addressed the problem.
Source[1]